So what is better for squash an open throat teardrop racquet or a closed throat racquet with a bridge? The answer is it depends on the player! To better understand that answer we need to know what the pro's and con's of each type are.
Open Throat or Teardrop Racquet
The racquet above, the Tecnifibre Carboflex X-Speed 125 has an open throat or a teardrop style of head. The primary benefits of an open throat are a larger sweet spot and more power. The larger sweet spot is provided because of the larger distance between where the string contacts the frame. This is also why a teardrop head will generally provide more power.
The elasticity of the string, its give on contact with the ball and its snapping back in to place is how the string imparts force on the ball. The more the string can give and then snap back the more velocity the ball will have coming off of the strings. The longer the strings the more they can give and thus the more power can be achieved.